BB_HMEC_US

Notes on the correct use of the headsets!
Warning! This headset can cause the aircraft communication
equipment (ie: intercom and radios) to function differently than
intended if the latter does not support the operation of the
headset. This warning applies for the following models:
Product Name Part No. Cat. No.
HMEC 25-BA 025-230-215 004438
HMEC 25-KAL 025-230-615 004935
HMEC 25-KAP 025-230-315 004567
HMEC 25-KAP-1 025-230-316 004568
HMEC 25-KAP-2 025-230-715 005307
HMEC 25-KAP-2 DIAMOND 025-230-715 500528
HMEC 45-KAP 045-230-315 004570
HMDC 25-BAA 004463
HMEC 302 300-231-715 005306
HMEC 352 300-231-7150 500567
HMEC 46-KP 046-35-999-3111 500475
HMEC 46-V-KP 046-35-999-3161 500476
The above models obtain their operating DC supply voltage via the
tip (pin 1) of the microphone plug (PJ 068 or equivalent). The
communication equipment must provide the DC supply at this
contact in order to activate the NoiseGard™ function of the
headset. However, some aircraft communication systems use this
contact for the PTT (push to transmit), or other, function. For this
reason, inserting the microphone plug can cause the PTT function
to be partly or completely triggered unintentionally.
If you have any questions in this connection, please contact the
aircraft manufacturer or an approved avionics service company.
Sennheiser electronic GmbH & Co. KG
Printed in Germany 520174 Publ. 10/06
BB_HMECdiv_1006_520174_1006_Sp2.fm Seite 2 Freitag, 3. November 2006 11:12 11